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Message-ID: <lsq.1404846110.674616034@decadent.org.uk> Date: Tue, 08 Jul 2014 20:01:50 +0100 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Russell King" <rmk+kernel@....linux.org.uk>, "Liu Hua" <sdu.liu@...wei.com> Subject: [PATCH 3.2 120/125] ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr 3.2.61-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Liu Hua <sdu.liu@...wei.com> commit 8fad87bca7ac9737e413ba5f1656f1114a8c314d upstream. When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will overflow if pfn >= 0x100000 in copy_oldmem_page. So use __pfn_to_phys for converting. Signed-off-by: Liu Hua <sdu.liu@...wei.com> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- arch/arm/kernel/crash_dump.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arm/kernel/crash_dump.c +++ b/arch/arm/kernel/crash_dump.c @@ -39,7 +39,7 @@ ssize_t copy_oldmem_page(unsigned long p if (!csize) return 0; - vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); + vaddr = ioremap(__pfn_to_phys(pfn), PAGE_SIZE); if (!vaddr) return -ENOMEM; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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